Basic Framework Idea for Yorick Rework/Relaunch

So I've been thinking about ways to make Yorick into a cool, unique champion that's fun to play. I'm not concerned about balance here, so any numbers (or lack thereof) I put out are certainly open to change, but I think I've got a pretty solid idea here.

Passive - Gravedigger: Every 5th basic attack, Yorick digs up a Ghoul. Ghouls last for 15 seconds, have the health of a siege minion, and follow Yorick's movement and targeting commands.

Q - Chilling Stance: Yorick gains movement speed in this stance. Ghouls' attacks slow enemies.

W - Explosive Stance: Yorick's basic attacks deal extra magic damage on hit (scales with AP). Ghouls will detonate upon attacking a monster, minion or champion, dealing AoE magic damage.

E - Vampiric Stance: Yorick and Ghouls gain attack speed and lifesteal (scales with AD).

R - Living Dead: Yorick immediately summons 3/4/5 Ghouls.

So basically this Yorick is all about building up a consistent stream of Ghouls and using them to their fullest capacity. Gone is the bug-ridden, off-theme and redundant resurrection ult, replaced with the ability to get more Ghouls on the field. What do you think of this as a basic framework for a new Yorick?